摘要:
The invention provides an anion-deficient lithium transition-metal phosphate as an electrode-active material, which is represented by the chemical formula Li1−xM(PO4)1−y (0≦x≦0.15, 0≦y≦0.05). The invention provides a method for preparing said Li1−xM(PO4)1−y, which comprises preparing a precursor of lithium transition-metal phosphate; mixing said precursor with water under reaction conditions of 200˜700 and 180˜550 bar to produce an anion-deficient lithium transition-metal phosphate; and calcining, or granulating and calcining the resultant compound. The invention also provides electrochemical devices employing said Li1−xM(PO4)1−y as an electrode-active material.
摘要:
Provided is barium titanate based powder represented by Chemical Formula 1: (BaxR1r1R2r2)(TiyR3r3R4r4)O3 [Chemical Formula 1] wherein R1 is at least one element selected from the group consisting of yttrium (Y) and lanthanoids; R2 is at least one element selected from the group consisting of magnesium (Mg), calcium (Ca) and strontium (Sr); R3 includes phosphorus (P) and niobium (Nb); R4 is at least one element selected from the group consisting of aluminum (Al), vanadium (V), chrome (Cr), manganese (Mn), cobalt (Co), zirconium (Zr) and tantalum (Ta); r1 and r3 independently represent a real number greater than 0 and equal to or less than 0.05; r2 and r4 independently represent a real number greater than 0 and equal to or less than 0.1; and (x+r1+r2)/(y+r3+r4) is a real number ranging from 0.85 to 1.15.
摘要:
Provided is barium titanate based powder represented by Chemical Formula 1: (BaxR1r1R2r2)(TiyR3r3R4r4)O3 [Chemical Formula 1] wherein R1 is at least one element selected from the group consisting of yttrium (Y) and lanthanoids; R2 is at least one element selected from the group consisting of magnesium (Mg), calcium (Ca) and strontium (Sr); R3 includes phosphorus (P) and niobium (Nb); R4 is at least one element selected from the group consisting of aluminum (Al), vanadium (V), chrome (Cr), manganese (Mn), cobalt (Co), zirconium (Zr) and tantalum (Ta); r1 and r3 independently represent a real number greater than 0 and equal to or less than 0.05; r2 and r4 independently represent a real number greater than 0 and equal to or less than 0.1; and (x+r1+r2)/(y+r3+r4) is a real number ranging from 0.85 to 1.15.